Step 1: Prepare the Tart Crust - In a large mixing bowl, combine flour, cocoa powder, and kosher salt. Mix well.
Step 2: Add Butter and Sugar - Add butter and powdered sugar to the dry ingredients. Mix until resembling coarse crumbs.
Step 3: Incorporate Egg Yolks - Add egg yolks and vanilla extract. Stir until the dough is soft and slightly sticky.
Step 4: Chill the Dough - Press dough into tart pan, prick with a fork, and refrigerate for at least 30 minutes.
Step 5: Bake the Crust - Preheat oven to 350°F. Bake for 15-20 minutes until set. Let cool completely.
Step 6: Make the Caramel Filling - In a saucepan, combine sugar and heavy cream. Boil until golden, then cool slightly.
Step 7: Fill the Tart - Pour caramel filling into cooled crust and let set at room temperature.
Step 8: Prepare the Ganache - Heat heavy cream in a double boiler, pour over chocolate chips, and stir until smooth.
Step 9: Assemble the Tart - Pour ganache over caramel layer and refrigerate for at least 2 hours.
Step 10: Serve and Enjoy! - Remove from pan, slice, and serve.